/*
 * Copyright 2014 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */

package io.netty.handler.ssl;

import javax.net.ssl.KeyManager;

import javax.net.ssl.KeyManagerFactory;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLException;
import javax.net.ssl.SSLSessionContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.TrustManagerFactory;
import java.io.File;
import java.security.PrivateKey;
import java.security.cert.X509Certificate;

/**
 * A server-side {@link SslContext} which uses JDK's SSL/TLS implementation.
 *
 * @deprecated Use {@link SslContextBuilder} to create {@link JdkSslContext}
 *             instances and only use {@link JdkSslContext} in your code.
 */
@Deprecated
public final class JdkSslServerContext extends JdkSslContext
{

    /**
     * Creates a new instance.
     *
     * @param certChainFile an X.509 certificate chain file in PEM format
     * @param keyFile a PKCS#8 private key file in PEM format
     * @deprecated use {@link SslContextBuilder}
     */
    @Deprecated
    public JdkSslServerContext(File certChainFile, File keyFile)
            throws SSLException
    {
        this(certChainFile, keyFile, null);
    }

    /**
     * Creates a new instance.
     *
     * @param certChainFile an X.509 certificate chain file in PEM format
     * @param keyFile a PKCS#8 private key file in PEM format
     * @param keyPassword the password of the {@code keyFile}. {@code null} if
     *        it's not password-protected.
     * @deprecated use {@link SslContextBuilder}
     */
    @Deprecated
    public JdkSslServerContext(File certChainFile, File keyFile,
            String keyPassword) throws SSLException
    {
        this(certChainFile, keyFile, keyPassword, null,
                IdentityCipherSuiteFilter.INSTANCE,
                JdkDefaultApplicationProtocolNegotiator.INSTANCE, 0, 0);
    }

    /**
     * Creates a new instance.
     *
     * @param certChainFile an X.509 certificate chain file in PEM format
     * @param keyFile a PKCS#8 private key file in PEM format
     * @param keyPassword the password of the {@code keyFile}. {@code null} if
     *        it's not password-protected.
     * @param ciphers the cipher suites to enable, in the order of preference.
     *        {@code null} to use the default cipher suites.
     * @param nextProtocols the application layer protocols to accept, in the
     *        order of preference. {@code null} to disable TLS NPN/ALPN
     *        extension.
     * @param sessionCacheSize the size of the cache used for storing SSL
     *        session objects. {@code 0} to use the default value.
     * @param sessionTimeout the timeout for the cached SSL session objects, in
     *        seconds. {@code 0} to use the default value.
     * @deprecated use {@link SslContextBuilder}
     */
    @Deprecated
    public JdkSslServerContext(File certChainFile, File keyFile,
            String keyPassword, Iterable<String> ciphers,
            Iterable<String> nextProtocols, long sessionCacheSize,
            long sessionTimeout) throws SSLException
    {
        this(certChainFile, keyFile, keyPassword, ciphers,
                IdentityCipherSuiteFilter.INSTANCE,
                toNegotiator(toApplicationProtocolConfig(nextProtocols), true),
                sessionCacheSize, sessionTimeout);
    }

    /**
     * Creates a new instance.
     *
     * @param certChainFile an X.509 certificate chain file in PEM format
     * @param keyFile a PKCS#8 private key file in PEM format
     * @param keyPassword the password of the {@code keyFile}. {@code null} if
     *        it's not password-protected.
     * @param ciphers the cipher suites to enable, in the order of preference.
     *        {@code null} to use the default cipher suites.
     * @param cipherFilter a filter to apply over the supplied list of ciphers
     * @param apn Provides a means to configure parameters related to
     *        application protocol negotiation.
     * @param sessionCacheSize the size of the cache used for storing SSL
     *        session objects. {@code 0} to use the default value.
     * @param sessionTimeout the timeout for the cached SSL session objects, in
     *        seconds. {@code 0} to use the default value.
     * @deprecated use {@link SslContextBuilder}
     */
    @Deprecated
    public JdkSslServerContext(File certChainFile, File keyFile,
            String keyPassword, Iterable<String> ciphers,
            CipherSuiteFilter cipherFilter, ApplicationProtocolConfig apn,
            long sessionCacheSize, long sessionTimeout) throws SSLException
    {
        this(certChainFile, keyFile, keyPassword, ciphers, cipherFilter,
                toNegotiator(apn, true), sessionCacheSize, sessionTimeout);
    }

    /**
     * Creates a new instance.
     *
     * @param certChainFile an X.509 certificate chain file in PEM format
     * @param keyFile a PKCS#8 private key file in PEM format
     * @param keyPassword the password of the {@code keyFile}. {@code null} if
     *        it's not password-protected.
     * @param ciphers the cipher suites to enable, in the order of preference.
     *        {@code null} to use the default cipher suites.
     * @param cipherFilter a filter to apply over the supplied list of ciphers
     * @param apn Application Protocol Negotiator object.
     * @param sessionCacheSize the size of the cache used for storing SSL
     *        session objects. {@code 0} to use the default value.
     * @param sessionTimeout the timeout for the cached SSL session objects, in
     *        seconds. {@code 0} to use the default value.
     * @deprecated use {@link SslContextBuilder}
     */
    @Deprecated
    public JdkSslServerContext(File certChainFile, File keyFile,
            String keyPassword, Iterable<String> ciphers,
            CipherSuiteFilter cipherFilter,
            JdkApplicationProtocolNegotiator apn, long sessionCacheSize,
            long sessionTimeout) throws SSLException
    {
        this(null, null, certChainFile, keyFile, keyPassword, null, ciphers,
                cipherFilter, apn, sessionCacheSize, sessionTimeout);
    }

    /**
     * Creates a new instance.
     * @param trustCertCollectionFile an X.509 certificate collection file in
     *        PEM format. This provides the certificate collection used for
     *        mutual authentication. {@code null} to use the system default
     * @param trustManagerFactory the {@link TrustManagerFactory} that provides
     *        the {@link TrustManager}s that verifies the certificates sent from
     *        clients. {@code null} to use the default or the results of parsing
     *        {@code trustCertCollectionFile}.
     * @param keyCertChainFile an X.509 certificate chain file in PEM format
     * @param keyFile a PKCS#8 private key file in PEM format
     * @param keyPassword the password of the {@code keyFile}. {@code null} if
     *        it's not password-protected.
     * @param keyManagerFactory the {@link KeyManagerFactory} that provides the
     *        {@link KeyManager}s that is used to encrypt data being sent to
     *        clients. {@code null} to use the default or the results of parsing
     *        {@code keyCertChainFile} and {@code keyFile}.
     * @param ciphers the cipher suites to enable, in the order of preference.
     *        {@code null} to use the default cipher suites.
     * @param cipherFilter a filter to apply over the supplied list of ciphers
     *        Only required if {@code provider} is {@link SslProvider#JDK}
     * @param apn Provides a means to configure parameters related to
     *        application protocol negotiation.
     * @param sessionCacheSize the size of the cache used for storing SSL
     *        session objects. {@code 0} to use the default value.
     * @param sessionTimeout the timeout for the cached SSL session objects, in
     *        seconds. {@code 0} to use the default value.
     * @deprecated use {@link SslContextBuilder}
     */
    @Deprecated
    public JdkSslServerContext(File trustCertCollectionFile,
            TrustManagerFactory trustManagerFactory, File keyCertChainFile,
            File keyFile, String keyPassword,
            KeyManagerFactory keyManagerFactory, Iterable<String> ciphers,
            CipherSuiteFilter cipherFilter, ApplicationProtocolConfig apn,
            long sessionCacheSize, long sessionTimeout) throws SSLException
    {
        this(trustCertCollectionFile, trustManagerFactory, keyCertChainFile,
                keyFile, keyPassword, keyManagerFactory, ciphers, cipherFilter,
                toNegotiator(apn, true), sessionCacheSize, sessionTimeout);
    }

    /**
     * Creates a new instance.
     * @param trustCertCollectionFile an X.509 certificate collection file in
     *        PEM format. This provides the certificate collection used for
     *        mutual authentication. {@code null} to use the system default
     * @param trustManagerFactory the {@link TrustManagerFactory} that provides
     *        the {@link TrustManager}s that verifies the certificates sent from
     *        clients. {@code null} to use the default or the results of parsing
     *        {@code trustCertCollectionFile}
     * @param keyCertChainFile an X.509 certificate chain file in PEM format
     * @param keyFile a PKCS#8 private key file in PEM format
     * @param keyPassword the password of the {@code keyFile}. {@code null} if
     *        it's not password-protected.
     * @param keyManagerFactory the {@link KeyManagerFactory} that provides the
     *        {@link KeyManager}s that is used to encrypt data being sent to
     *        clients. {@code null} to use the default or the results of parsing
     *        {@code keyCertChainFile} and {@code keyFile}.
     * @param ciphers the cipher suites to enable, in the order of preference.
     *        {@code null} to use the default cipher suites.
     * @param cipherFilter a filter to apply over the supplied list of ciphers
     *        Only required if {@code provider} is {@link SslProvider#JDK}
     * @param apn Application Protocol Negotiator object.
     * @param sessionCacheSize the size of the cache used for storing SSL
     *        session objects. {@code 0} to use the default value.
     * @param sessionTimeout the timeout for the cached SSL session objects, in
     *        seconds. {@code 0} to use the default value.
     * @deprecated use {@link SslContextBuilder}
     */
    @Deprecated
    public JdkSslServerContext(File trustCertCollectionFile,
            TrustManagerFactory trustManagerFactory, File keyCertChainFile,
            File keyFile, String keyPassword,
            KeyManagerFactory keyManagerFactory, Iterable<String> ciphers,
            CipherSuiteFilter cipherFilter,
            JdkApplicationProtocolNegotiator apn, long sessionCacheSize,
            long sessionTimeout) throws SSLException
    {
        super(newSSLContext(toX509CertificatesInternal(trustCertCollectionFile),
                trustManagerFactory,
                toX509CertificatesInternal(keyCertChainFile),
                toPrivateKeyInternal(keyFile, keyPassword), keyPassword,
                keyManagerFactory, sessionCacheSize, sessionTimeout), false,
                ciphers, cipherFilter, apn, ClientAuth.NONE, false);
    }

    JdkSslServerContext(X509Certificate[] trustCertCollection,
            TrustManagerFactory trustManagerFactory,
            X509Certificate[] keyCertChain, PrivateKey key, String keyPassword,
            KeyManagerFactory keyManagerFactory, Iterable<String> ciphers,
            CipherSuiteFilter cipherFilter, ApplicationProtocolConfig apn,
            long sessionCacheSize, long sessionTimeout, ClientAuth clientAuth,
            boolean startTls) throws SSLException
    {
        super(newSSLContext(trustCertCollection, trustManagerFactory,
                keyCertChain, key, keyPassword, keyManagerFactory,
                sessionCacheSize, sessionTimeout), false, ciphers, cipherFilter,
                toNegotiator(apn, true), clientAuth, startTls);
    }

    private static SSLContext newSSLContext(
            X509Certificate[] trustCertCollection,
            TrustManagerFactory trustManagerFactory,
            X509Certificate[] keyCertChain, PrivateKey key, String keyPassword,
            KeyManagerFactory keyManagerFactory, long sessionCacheSize,
            long sessionTimeout) throws SSLException
    {
        if (key == null && keyManagerFactory == null)
        {
            throw new NullPointerException("key, keyManagerFactory");
        }

        try
        {
            if (trustCertCollection != null)
            {
                trustManagerFactory = buildTrustManagerFactory(
                        trustCertCollection, trustManagerFactory);
            }
            if (key != null)
            {
                keyManagerFactory = buildKeyManagerFactory(keyCertChain, key,
                        keyPassword, keyManagerFactory);
            }

            // Initialize the SSLContext to work with our key managers.
            SSLContext ctx = SSLContext.getInstance(PROTOCOL);
            ctx.init(keyManagerFactory.getKeyManagers(),
                    trustManagerFactory == null ? null
                            : trustManagerFactory.getTrustManagers(),
                    null);

            SSLSessionContext sessCtx = ctx.getServerSessionContext();
            if (sessionCacheSize > 0)
            {
                sessCtx.setSessionCacheSize(
                        (int) Math.min(sessionCacheSize, Integer.MAX_VALUE));
            }
            if (sessionTimeout > 0)
            {
                sessCtx.setSessionTimeout(
                        (int) Math.min(sessionTimeout, Integer.MAX_VALUE));
            }
            return ctx;
        }
        catch (Exception e)
        {
            if (e instanceof SSLException)
            {
                throw (SSLException) e;
            }
            throw new SSLException(
                    "failed to initialize the server-side SSL context", e);
        }
    }

}
